Input/output library – cppreference.com

Original:

C++ includes two input/output libraries: a modern, stream-based I/O library and the standard set of C-style I/O functions.

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Original:

The stream-based input/output library is organized around abstract input/output devices. These abstract devices allow the same code to handle input/output to files, memory streams, or custom adaptor devices that perform arbitrary operations (e.g. compression) on the fly.

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Original:

Most of the classes are templated, so they can be adapted to any basic character type. Separate typedefs are provided for the most common basic character types (char and wchar_t). The classes are organized into the following hierarchy:

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Original:

The following typedefs for common character types are provided:

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|<source lang="cpp">}}
{{tr|typedef basic_ios <char> ios;|typedef basic_ios<char>                ios;}}
{{tr|typedef basic_ios <wchar_t> WiOS;|typedef basic_ios<wchar_t>            wios;}}

{{tr|typedef basic_streambuf <char> streambuf;|typedef basic_streambuf<char>     streambuf;}}
{{tr|typedef basic_streambuf <wchar_t> wstreambuf;|typedef basic_streambuf<wchar_t> wstreambuf;}}
{{tr|typedef basic_filebuf <char> filebuf;|typedef basic_filebuf<char>         filebuf;}}
{{tr|typedef basic_filebuf <wchar_t> wfilebuf;|typedef basic_filebuf<wchar_t>     wfilebuf;}}
{{tr|typedef basic_stringbuf <char> stringbuf;|typedef basic_stringbuf<char>     stringbuf;}}
{{tr|typedef basic_stringbuf <wchar_t> wstringbuf;|typedef basic_stringbuf<wchar_t> wstringbuf;}}

{{tr|typedef basic_istream <char> istream;|typedef basic_istream<char>         istream;}}
{{tr|typedef basic_istream <wchar_t> wistream;|typedef basic_istream<wchar_t>     wistream;}}
{{tr|typedef basic_ostream <char> ostream;|typedef basic_ostream<char>         ostream;}}
{{tr|typedef basic_ostream <wchar_t> wostream;|typedef basic_ostream<wchar_t>     wostream;}}
{{tr|typedef basic_iostream <char> iostream;|typedef basic_iostream<char>       iostream;}}
{{tr|typedef basic_iostream <wchar_t> wiostream;|typedef basic_iostream<wchar_t>   wiostream;}}

{{tr|typedef basic_ifstream <char> ifstream;|typedef basic_ifstream<char>       ifstream;}}
{{tr|typedef basic_ifstream <wchar_t> wifstream;|typedef basic_ifstream<wchar_t>   wifstream;}}
{{tr|typedef basic_ofstream <char> ofstream;|typedef basic_ofstream<char>       ofstream;}}
{{tr|typedef basic_ofstream <wchar_t> wofstream;|typedef basic_ofstream<wchar_t>   wofstream;}}
{{tr|typedef basic_fstream <char> fstream;|typedef basic_fstream<char>         fstream;}}
{{tr|typedef basic_fstream <wchar_t> wfstream;|typedef basic_fstream<wchar_t>     wfstream;}}

{{tr|typedef basic_istringstream <char> istringstream;|typedef basic_istringstream<char>     istringstream;}}
{{tr|typedef basic_istringstream <wchar_t> wistringstream;|typedef basic_istringstream<wchar_t> wistringstream;}}
{{tr|typedef basic_ostringstream <char> ostringstream;|typedef basic_ostringstream<char>     ostringstream;}}
{{tr|typedef basic_ostringstream <wchar_t> wostringstream;|typedef basic_ostringstream<wchar_t> wostringstream;}}
{{tr|typedef basic_stringstream <char> stringstream;|typedef basic_stringstream<char>       stringstream;}}
{{tr|typedef basic_stringstream <wchar_t> wstringstream;|typedef basic_stringstream<wchar_t>   wstringstream;}}
{{tr|</ Source>|

Original:

{{{2}}}

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Original:

Predefined standard stream objects:

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|<source lang="cpp">}}
{{tr|extern istream cin / / Standardeingabe (stdin)|extern  istream  cin;   //standard input (stdin)}}
{{tr|extern wistream wcin;|extern wistream wcin;}}
{{tr|extern ostream cout / / Standard-Ausgabe (stdout)|extern  ostream  cout;  //standard output (stdout)}}
{{tr|extern wostream wcout;|extern wostream wcout;}}
{{tr|extern ostream cerr; / / Standardfehler (stderr)|extern  ostream  cerr;  //standard error (stderr)}}
{{tr|extern wostream wcerr;|extern wostream wcerr;}}
{{tr|extern ostream clog / / Standard-log (stdlog)|extern  ostream  clog;  //standard log (stdlog)}}
{{tr|extern wostream wclog;|extern wostream wclog;}}
{{tr|</ Source>|

Original:

{{{2}}}

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Original:

The stream-based I/O library uses I / O-Manipulatoren (e.g. std::boolalpha, std::hex, etc.) to control how streams behave.

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Original:

The following auxiliary types are defined:

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Original:

Four specializations of std::fpos are provided:

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Original:

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